fkie_cve-2022-49804
Vulnerability from fkie_nvd
Published
2025-05-01 15:16
Modified
2025-11-07 19:20
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: s390: avoid using global register for current_stack_pointer Commit 30de14b1884b ("s390: current_stack_pointer shouldn't be a function") made current_stack_pointer a global register variable like on many other architectures. Unfortunately on s390 it uncovers old gcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87 ("S/390: Fix PR89775. Stackpointer save/restore instructions removed")] and backported to gcc-8.4 and later. Due to this bug gcc versions prior to 8.4 generate broken code which leads to stack corruptions. Current minimal gcc version required to build the kernel is declared as 5.1. It is not possible to fix all old gcc versions, so work around this problem by avoiding using global register variable for current_stack_pointer.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a478952a8ac44e32316dc046a063a7dc34825aa6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e3c11025bcd2142a61abe5806b2f86a0e78118dfPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.18
linux linux_kernel 5.18
linux linux_kernel 5.18
linux linux_kernel 5.18
linux linux_kernel 5.18
linux linux_kernel 5.18
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E76F82CE-AD9A-4014-864C-9B13A33767D4",
              "versionEndExcluding": "6.0.10",
              "versionStartIncluding": "5.18.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*",
              "matchCriteriaId": "0384FA0A-DE99-48D7-84E3-46ED0C3B5E03",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "EAE6C6C5-4D21-4C04-897C-70CBBB3D7B91",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "DA5F085D-52F3-4EE2-8353-455D1A6FE073",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "D6EE5B78-0D83-4715-893C-ABD69B49E7FC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "EE723F14-047B-4FCF-B109-E0542EDFB063",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "2FCFCE58-5118-4D05-864E-C82CF20EABE5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390: avoid using global register for current_stack_pointer\n\nCommit 30de14b1884b (\"s390: current_stack_pointer shouldn\u0027t be a\nfunction\") made current_stack_pointer a global register variable like\non many other architectures. Unfortunately on s390 it uncovers old\ngcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87\n(\"S/390: Fix PR89775. Stackpointer save/restore instructions removed\")]\nand backported to gcc-8.4 and later. Due to this bug gcc versions prior\nto 8.4 generate broken code which leads to stack corruptions.\n\nCurrent minimal gcc version required to build the kernel is declared\nas 5.1. It is not possible to fix all old gcc versions, so work\naround this problem by avoiding using global register variable for\ncurrent_stack_pointer."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: s390: evitar el uso de un registro global para current_stack_pointer. El commit 30de14b1884b (\"s390: current_stack_pointer no deber\u00eda ser una funci\u00f3n\") convirti\u00f3 current_stack_pointer en una variable de registro global, como en muchas otras arquitecturas. Desafortunadamente, en s390, se descubre un antiguo error de gcc corregido solo desde gcc-9.1 [commit 3ad7fed1cc87 de gcc (\"S/390: Correcci\u00f3n de PR89775. Se eliminaron las instrucciones de guardado/restauraci\u00f3n de Stackpointer\")] y se ha retroportado a gcc-8.4 y posteriores. Debido a este error, las versiones de gcc anteriores a la 8.4 generan c\u00f3digo defectuoso que provoca corrupciones en la pila. La versi\u00f3n m\u00ednima actual de gcc requerida para compilar el kernel es la 5.1. No es posible corregir todas las versiones antiguas de gcc, por lo que se puede solucionar este problema evitando el uso de la variable de registro global para current_stack_pointer."
    }
  ],
  "id": "CVE-2022-49804",
  "lastModified": "2025-11-07T19:20:12.617",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-05-01T15:16:03.717",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a478952a8ac44e32316dc046a063a7dc34825aa6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e3c11025bcd2142a61abe5806b2f86a0e78118df"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.